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On the application of BIM technology in cement industry

Date:2019-06-20 17:42 Source:未知Views:

Preface


With the development of the times, the new industrial revolution will lead mankind into the innovation and integration of energy, biology, materials technology and information technology, digital manufacturing technology, and will also bring about tremendous changes in industry, industry and society. Faced with the opportunities and challenges brought about by the new industrial revolution, countries have proposed plans such as "Made in China 2025" and "Industry 4.0". In this situation, China's cement industry also shoulders unshirkable responsibility. For this industry, BIM technology needs to be used as a breakthrough to establish digitalization and informationization of cement plants throughout the life cycle by establishing a parametric virtual simulation cement plant model. Management, thus achieving cross-integration of disciplines such as cement technology, information and digital manufacturing, and building a brand image of the world leader in cement manufacturing in China. Nowadays, some cement engineering design institutes in China have applied relevant BIM design software to the design of cement plants. However, the application of BIM technology in China's cement industry mostly stays at the level of 3D modeling, and more BIM technology. The function has yet to be applied and developed in the cement industry. To this end, I hope to introduce the application of BIM technology in the design, construction, production operation and maintenance and simulation research of cement plants, in order to provide technical reference for the application of BIM technology in the cement industry, so that it will continue to develop and bring to the industry. Come to advanced leading productivity.

Application of 1BIM technology in multi-dimensional design of cement factory

1.1 Revolutionary transformation of cement plant design concept


In terms of the application of BIM technology in the design field, its most successful is the realization of the transformation from the abstract two-dimensional design to the visual multi-dimensional design of the physical object. It completely changed the concept of traditional simple graphic design, and turned to the concept of “central control, multi-dimensional radiation” aiming at design objects, that is, the “center” around the design object, simultaneously carrying out the process, construction and warming at the same time. Through various aspects such as communication and automatic control, it can complete multi-dimensional design tasks and realize visualization at high efficiency and high precision at the same time.

Compared with the traditional two-dimensional drawing, the object targeted by BIM modeling is no longer a simple two-dimensional basic element of the dotted line surface, but directly operated like a rotary kiln, a gas and material conveying pipe, a combustion chamber, etc. Entity objects enrich the information of cement design models by giving them characteristic parameters such as size, shape, material, and materialized properties. At the same time, through the powerful information exchange capability of BIM technology, the rendering rendering or functional development of these models can be carried out. It can be said that the development and design using BIM technology is the second in China's cement design industry after the comprehensive application of CAD technology in the 1990s.

Sub-technical revolution.

1.2 Cement Factory Simulation Virtual Functionalization


BIM technology can provide much more functions than the cement industry has actually applied, all based on the parametric design of model objects and its powerful information exchange capabilities.

1.2.1 Visualizing the whole plant roaming function


Compared with traditional CAD drawings, the virtual simulation model of cement plants has undoubtedly a strong advantage. Firstly, the model is processed by 3Dmax, Maya and other rendering software, so that the virtual factory has a movie-level visual impact effect. At the beginning, the display can capture the viewer's heart. When viewing the map, you can visit the cement virtual anytime and anywhere. Simulation factory.

1.2.2 Equipment meso and disassembly function


Because there are many complicated equipments in the cement factory, the more troublesome is the parts at the joints of the various equipments. Because the spatial angles involved vary greatly and there are many irregularities, it is very difficult to design 2D drawings, especially It is particularly troublesome when looking for size parameters, which not only increases the probability of errors occurring in the drawing, but also adds a lot of trouble to the viewer. The virtual simulation model of the cement factory relies on its intuitive and accurate advantages, so that the viewer can simply drag the device or equipment through the handle or the mouse keyboard, and can observe from different angles by changing the spatial position. The appearance and internal structure of the equipment can also be used to disassemble and assemble the equipment or equipment to gain an in-depth understanding of the design concept and size of the equipment.

1.2.3 Anti-collision detection function


Because the design of the cement factory is not only related to the thermal, electrical, environmental protection and other professional aspects, but also more complicated in construction, structure and electromechanical than the traditional building, so that the approved drawings obtained by the construction party are still There are phenomena that Zhang Zhang is wrong. The predecessors imagine using the tools provided by the AutoCAD for Windows platform to check by the swept object method, but there are still many cases of frequent inspections, slow running speeds and insufficient accuracy . In contrast, using model collision software under the BIM technology platform, such as

Autodesk Navisworks Manage, by introducing models of various professions to collide, the overlapping parts are clear at a glance, thus perfectly ensuring the final accuracy and greatly reducing the waste of human and financial resources.

1.2.4 Project Data Review Function


During the roaming process, the software can select parts, call up the information of the selected parts, and obtain information such as size, material, etc. It is very convenient to consult, which also increases the interest of viewing pictures, greatly reducing the boring feeling of viewing pictures.

1.2.5 Convenient plotting function


When plotting, the designer can use the 3D view browser to Switching between different views of the cement factory, quickly designing the construction drawing of the cement factory, and also exporting the schedule to make a budget in advance to facilitate inspection and supervision during the construction process.

1.3 The design of the cement factory is magically magical


1.3.1 Practicality of professional family libraries


In order to simplify the work and high efficiency of the post work, it is possible to build a three-dimensional professional family library for the cement factory design, which is especially important for saving design time, so that when designing the cement factory, the model in the family library can be called and combined with the change. The parameters of the family can directly place the component model required by the cement plant in space to complete the design of a component.

Taking Autodesk Revit software as an example, its software divides families into three categories: system family, standard building family, and in-house family. The production and development of the Revit family is a prerequisite for the smooth start of the modeling work. The family can bring advantages to the establishment of the model, so that it can simulate the real information of the building entity or equipment equipment through digital information, including geometric and non-geometric information . The quality of the production family will affect both Revit's modeling capabilities and the actual price of the model.

Value . However, building a family requires not only the designer's high modeling ability, but also the expertise in fluid mechanics, heat transfer, and cement technology. Because the designer is designing a family of specialized equipment such as cement kiln, it is necessary to know how many parameters need to be designed, what parameters should be designed to accurately represent the information of the corresponding components of the model, and to clearly understand the association between the various components.

When the equipment is built, there will be no cases where the models overlap and the components cannot be connected, which is not true .

In general, the use of the family can greatly reduce time and effort. In the process of designing and manufacturing family of cement plants, due to the complicated equipment and few standard parts in the cement industry, the amount of information required to be parameterized in the design of the cement factory design library is huge, and it consumes a lot of resources and time of related enterprises, and Since many models involve the confidentiality of related technologies, related companies generally do not market their own hard-working family libraries, and can only be classified as corporate secrets. In view of the complexity of equipment and equipment in the cement industry, and the need for BIM technology to be promoted and applied in the cement factory design industry, relevant departments should organize the construction of industry family libraries. For this reason, the development of industry-based libraries based on BIM technology has great market potential. And application prospects.


1.3.2 Efficient design tools


When using BIM modeling software such as Revit to build a new 3D model of cement factory, if the system has established the corresponding family library, that is, has a full set of various types of families, if you encounter similar components in the design of the family module, You only need to call up the family in the family library, and get the destination model by modifying the parameters. Designers in the design of similar families Only need to create a new file first, enter the Revit family model editor, with the help of the set reference line and reference surface, stretch, rotate, fuse and other basic graphics, and complete the size design, elevation positioning With the process of placing equipment, the three-dimensional shape of the new equipment or equipment components can be fixed. After the basic form of the unit of the family is determined, in a more precise design, the digital control of the family can be realized by setting a series of parameters in the family editor by writing formulas and conditional statements. Define, such as the material, height and radius when designing the pipeline.

At the same time, when designing the factory, you can also find the basic building family such as walls, columns, doors, windows, or other professional equipment families such as kiln, furnace, cement warehouse, etc., and then place the family modules directly in space. With the corresponding location, you can quickly build a cement factory, which is the same as building blocks. Therefore, compared with the use of CAD software to draw 2D drawings, it is more interesting in design, which can greatly improve work efficiency, save design time and design better.

When constructing the 3D model of the cement factory, due to the professionalism and particularity of the cement industry, many components do not have standard parts and are non-standard parts. However, all components of professional equipment such as cement kiln need to be parameterized in the design (especially It is some physical property. Because of its structural complexity, the parameters need to be constantly adjusted and compared, and some components have many different shapes, which can not be modeled by the family library. For this reason, tools such as sheet metal and stakeout can be used to quickly Seamless and automatic optimization of the butt joints.

In addition, if you have Autodesk CAD 2D drawings, you can also import CAD 2D drawings directly into the software, and use the isBIM molder to flip the mold to quickly complete the 2D to 3D design.

1.3.3 Advanced 3D display technology


When expressing a special-shaped piece of a cement factory with a two-dimensional CAD drawing, it is often necessary to use several drawings to express the shaped piece from each view, and strive to express the accuracy of the drawing, but this also increases the workload of the drafter. The 3D model view is a good way to avoid this problem. The designer only needs to design the 3D model to switch the view through the 3D browser. It can also be switched to the full section view, the 1⁄2 section view and the function keys. The one-quarter view allows the designer to easily view the model, which perfectly solves the limitation of the limited visual space of the 2D drawing, thus improving the design accuracy.

Application of 2BIM technology in the construction stage of cement entity factory

In the past construction of cement plants, the problems often encountered are

How to ensure the real-time controllable construction quality, construction schedule, project cost and effective coordination of various types of work in the cement plant during the construction period . BIM technology can also be used to build cement plants

Project management to solve the above problems. At present, the overall design level of China's cement industry is very good, and it has been considered in high-efficiency combustion, waste heat utilization, insulation and insulation, automatic control, etc., but it also makes the construction process control very complicated. To this end, the BIM technology can be used to strengthen the process management of the cement plant during the construction and construction phase. Generally, the following types of work can be carried out during the construction phase of the physical plant by means of BIM technology.

2.1 For construction quality control


Project members can access relevant data at any time to facilitate data query. For example, due to the complexity of cement equipment, ordinary workers may not know how to install them. The project technicians can let the workers visualize and install and disassemble the equipment and combine the equipment instructions. They are familiar with the installation and disassembly of the equipment. , and then install large equipment to avoid the risk of misconfiguration, mis-wiup or wrong connection.

At the same time, through the Navisworks software, the cement plant design data created by software such as AutoCAD and Revit series is combined with the geometry and information from other design tools, and it can be used as a three-dimensional virtual project of the whole cement factory for construction inspection or anti-collision inspection. Guarantee construction quality .

Of course, in order to solve the problems encountered in the construction, the construction management personnel can arrange the data, description or pictures of the relevant questions to be uploaded to the platform center, and the experts of the platform can jointly diagnose or solve the problem by accelerating the problem.

2.2 Used for construction schedule control


Using the BIM platform, linking the construction progress and the area divided by the flow section, performing animation simulation and data analysis of the construction progress, and using the Internet of Things technology to dynamically track and extract the construction progress, human resources, construction materials, mechanical equipment and other information, based on The cloud computing and big data technologies in the platform analyze and manage the data and adjust the construction plan in real time .

At the same time, we can combine the network roaming function of the platform, dynamic project schedule simulation and photo-level visualization to realize the construction plan and show the progress of the project construction plan.

Tables can also be used to create simulation animations to show construction workers the construction steps to avoid rework due to construction errors. This not only urged the workers to complete the construction on time, but also avoided the quality hazards caused by the work.


2.3 For engineering cost control


The BIM model is adopted in the construction, and the material consumption and the amount of work can be accurately and efficiently calculated based on the platform, so that the project budget can be conveniently carried out. Integrate civil engineering, electromechanical, structural and other multi-professional models in the BIM platform, and link their schedules, lists, and models to form a capital song.Line and resource curves, while real-time dynamic tracking of materials, comparing the actual list of projects with the BIM platform budget list, can greatly improve the efficiency and cost control of managers. For example, Using accurate calculations, it is possible to refine What kind of steel bars are required for each component, how many steel bars are needed, how to lay out the most steel bars, etc. Such fine management is undoubtedly very effective for construction cost savings .

2.4 For personnel division and logistics management


Through the careful management of the project schedule and the amount of labor, it is also possible to rationalize the division of management personnel and workers involved in the construction, which types of work are required at each stage, how many people are needed, and how Long it takes to complete the assigned tasks. avoid work, save time and save on labor costs.

In terms of logistics management, by visualizing the construction site, the construction site layout plan can be continuously optimized and rationally laid out, and the site components and equipment can be removed reasonably according to the work schedule, the secondary transportation can be reduced, and The work efficiency can be improved.

Application of 3BIM Technology in Production and Maintenance of Cement Solid Factory

In order to solve the problem of cognitive isolation of information islands in production and operation,

Using the BIM platform, the integration of the Internet of Things, cloud computing and big data technology can provide an efficient and unified management platform for the management team. The platform consists of three levels, from top to bottom, the perception layer, the network The sensing layer includes camera monitoring equipment, various types of sensors and various types of mobile terminals to ensure the identification and collection of various types of information; the network layer uses the Internet of Things technology, and electronically encodes raw Information, products, and mechanical equipment to collect the collected information. Information can be quickly transmitted on the Internet to achieve factory-to-people communication; the application layer uses cloud computing and big data technology to achieve intelligent management of the factory in order to Achieve the following functions.

3.1 Smart Procurement Sales


By paging orders through the e-commerce platform, the information is then transferred to the big data platform for storage management, and the whole process management of bulk loading is realized through radio frequency identification (RFID) technology, which greatly reduces the workload of the Purchasing department and the sales department. When the information is accumulated to a certain extent, the sales volume and raw material price can be predicted based on this, and the procurement plan can be reasonably formulated to achieve efficient enterprise management, information transparency , and profit maximization.

3.2 Strict production monitoring


By changing the way of manual reporting, the platform will collect all kinds of information collected, automatically generating various reports and upload them to the group, strengthen the Group's ability to control the factory, and track the important processes of the cement process production line through The intelligent positioning of the Internet of Things. Parameters, equipment status, material level, feeding amount, etc., update the dynamic data at any time, and alert the product to prevent strict control of product quality.

3.3 Efficient energy management


Through seamless integration with instruments such as water and electricity, the energy consumption of each energy source can be accurately grasped, and the collected data can be aggregated and analyzed, energy scheduling can be rationally performed, system scheduling can be optimized, and energy cost control can be strengthened.

3.4 Reasonable maintenance


Through the information transmitted by the sensor and the relevant parameters of the device, the working status of the device is automatically detected and the fault prediction is performed in time. The data of the online analysis device is used to scientifically formulate the maintenance plan, and the mobile device can be used to call up the relevant device model after the fault damage occurs. The parameters, query the supply and installation of related accessories, greatly reduce the loss of the enterprise.

In addition, the BIM platform has many features, waiting for us to explore and utilize.

Application of 4BIM Technology in Numerical Simulation and Process Simulation of Cement Industry

The multi-dimensional virtual simulation design of cement factory based on BIM technology is not limited to the multi-dimensional simulation geometry model in the way of roaming. The BIM technology can also give the model more physicochemical property information, so that it can have in the virtual environment of the computer. There are physical and chemical properties similar to real ones. Researchers can perform simulation studies based on geometric models in BIM, including research in engineering mechanics, computational fluid dynamics, fuel combustion, and pollutant emissions. For example, researchers can use CFDs such as Autodesk CFD and Ansys Fluent based on geometric models in the simulated cement plant platform.

The software simulates the flow field in thermal equipment such as cement kiln ; or design a set of mathematical models independently as the interface of the central control system to optimize and improve the current cement process parameters.

4.1 Numerical Simulation of the "Three Passes and One Reverse" Process of Thermal Engineering with CFD


The thermal equipment in the cement industry is high-temperature non-transparent, and we are not aware of the fluid flow, heat and mass transfer effects, and chemical reactions. Using CFD numerical simulation technology, this problem can be solved, and the flow process of the airflow, the trajectory of the particles, the combustion state of the fuel, and the decomposition of the raw materials can be visually displayed.

4.2 Numerical Simulation of Pollutant Emissions by CFD


The main atmospheric pollutants produced in the new dry process cement production process are NOx and SOx, which are derived from rotary kiln and decomposition furnace. In order to understand the formation mechanism of NOx and SOx and carry out targeted emission reduction control design, CFD numerical simulation is undoubtedly an indispensable technical means. In the existing research, whether it is the optimization design of staged combustion denitration in the decomposition furnace, or the use of oxyfuel combustion technology and nitrogen reduction technology in the rotary kiln, the flow field analysis and parameter optimization design are carried out by means of CFD. Energy saving

The purpose of emission reduction.

4.3 Simulation study on co-processing of domestic waste in cement kiln combined with simulation of central control system


China's cement kiln co-processing domestic garbage is in the stage of popularization and application , in order to better control the impact of the combustion of domestic garbage in the garbage treatment process on the process parameters and in order to improve the utilization of alternative fuels, cement kiln The central control system conducts process control simulation research for the simulated object.

Based on the virtual simulation model of the constructed cement factory, the process of simulating the new dry process cement kiln to dispose of domestic garbage is simulated. According to the needs of the site, the design of the central control interface for the disposal of domestic garbage in the workshop can be carried out. The process is mathematically modeled to simulate the process. For example, optimizing the appropriate annual processing waste, the particle size of the combustibles, the calorific value and the water content, etc., to achieve the integration of information and digital manufacturing cross-knowledge, to build a new furnace design, process optimization and production control concept Then build a new virtual production and R&D platform, and carry out research and development on kiln design, equipment selection and process parameter optimization on this platform .

Compared with traditional research methods, on this simulation research platform, the object of the simulation experiment is no longer a simple kiln or rotary kiln, but all the equipment to be concerned in cement production. The researcher can pass the first The local re-macro research method optimizes the whole-line cement process, and then achieves the purpose of improving the design and optimizing the equipment and process by adjusting the process parameters.

5 Conclusion


The emergence of BIM technology provides a new development direction for the cement industry ecological development model. It can be foreseen that BIM technology will play an important role in the transformation and upgrading of the cement industry, but we still cannot ignore some of its software incompatibility, poor information exchange and integration difficulty. Major problems, these problems have led to the current function of BIM technology in cement production operation and maintenance and construction management. Therefore, the current problems of BIM can be solved through government-led, standard-setting, improving related software, and strengthening organizational coordination. It is believed that with the development and improvement of BIM technology, it will play an important role in promoting supply-side reform of China's manufacturing industry, accelerating the transformation and upgrading of China's manufacturing industry, and promoting the integration of the entire industry chain, making China stand out in the new industrial revolution.

And out .

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